from django.core.paginator import Paginator   # django分页器
from django.shortcuts import render, get_object_or_404
from django.conf import settings
from django.contrib.contenttypes.models import ContentType
from django.db.models import Count
from .models import BlogType, Blog
from read_statistics.models import ReadNum
from read_statistics.utils import read_statistics_once_read


# 获取博客列表共同的数据
def get_blog_list_common_data(request, blogs_all_list):
	# 每2篇博客进行分页
	paginator = Paginator(blogs_all_list, settings.EACH_PAGE_BLOGS_NUMBER)
	# 获取url的页码参数(GET请求)
	page_num = request.GET.get('page', 1)
	page_of_blogs = paginator.get_page(page_num)
	# 获取当前页码
	currentr_page_num = page_of_blogs.number
	# 获取当前页码前后各两页的页码范围
	page_range = list(range(max(currentr_page_num - 2, 1), currentr_page_num)) + \
	             list(range(currentr_page_num, min(currentr_page_num + 2, paginator.num_pages) + 1))
	# 加上省略页码标记
	if page_range[0] - 1 >= 2:
		page_range.insert(0, '...')
	if paginator.num_pages - page_range[-1] >= 2:
		page_range.append('...')
	# 加上首页和尾页
	if page_range[0] != 1:
		page_range.insert(0, 1)
	if page_range[-1] != paginator.num_pages:
		page_range.append(paginator.num_pages)

	# 获取博客分类的对应博客数量-annotate:注释
	'''blog_types = BlogType.objects.all()
	blog_types_list = []
	for blog_type in blog_types:
		blog_type.blog_count = Blog.objects.filter(blog_type=blog_type).count()
		blog_types_list.append(blog_type)
	'''
	# 获取日期归档对应的博客数量
	blog_dates = Blog.objects.dates('created_time', 'month', order='DESC')
	blog_dates_dict = {}
	for blog_date in blog_dates:
		blog_count = Blog.objects.filter(created_time__year=blog_date.year,
		                                created_time__month=blog_date.month).count()
		blog_dates_dict[blog_date] = blog_count

	context = {}
	context['blogs'] = page_of_blogs.object_list
	context['page_of_blogs'] = page_of_blogs
	# context['blogs_count'] = Blog.objects.all().count()
	context['page_range'] = page_range
	context['blog_types'] = BlogType.objects.annotate(blog_count=Count('blog'))
	# context['blog_types'] = BlogType.objects.all()
	context['blog_dates'] = blog_dates_dict
	return context


# 博客列表
def blog_list(request):
	blogs_all_list = Blog.objects.all()
	context = get_blog_list_common_data(request, blogs_all_list)
	return render(request, 'blog/blog_list.html', context)


def blogs_with_type(request, blog_type_pk):
	blog_type = get_object_or_404(BlogType, pk=blog_type_pk)
	blogs_all_list = Blog.objects.filter(blog_type=blog_type)
	context = get_blog_list_common_data(request, blogs_all_list)
	context['blog_type'] = blog_type
	return render(request, 'blog/blogs_with_type.html', context)


def blogs_with_date(request, year, month):
	blogs_all_list = Blog.objects.filter(created_time__year=year, created_time__month=month)
	context = get_blog_list_common_data(request, blogs_all_list)
	context['blogs_with_date'] = '%s年%s月' % (year, month)
	return render(request, 'blog/blogs_with_date.html', context)


def blog_detail(request, blog_pk):
	blog = get_object_or_404(Blog, pk=blog_pk)
	read_cookie_key = read_statistics_once_read(request, blog)
	# blog_content_type = ContentType.objects.get_for_model(blog)
	# comments = Comment.objects.filter(content_type=blog_content_type, object_id=blog.pk, parent=None)

	'''
	if not request.COOKIES.get('blog_%s_readed' % blog_pk):
		ct = ContentType.objects.get_for_model(Blog)
		if ReadNum.objects.filter(content_type=ct, object_id=blog.pk).count():
			# 存在记录
			readnum = ReadNum.objects.get(content_type=ct, object_id=blog.pk)
		else:
			# 不存在对应的记录
			readnum = ReadNum(content_type=ct, object_id=blog.pk)
		# 计数加1
		readnum.read_num += 1
		readnum.save()
	'''
	context = {}
	# 查询大于当前博客创建时间的最后一条博客(当前博客的上一条博客)
	context['previous_blog'] = Blog.objects.filter(created_time__gt=blog.created_time).last()
	# 查询小于当前博客创建时间的第一条博客(当前博客的下一条博客)
	context['next_blog'] = Blog.objects.filter(created_time__lt=blog.created_time).first()
	# 当前博客
	context['blog'] = blog
	# context['blog_dates'] = Blog.objects.dates('created_time', 'month', order='DESC')
	# context['comments'] = comments.order_by('-comment_time')
	# 评论回复数量
	# context['comment_count'] = Comment.objects.filter(content_type=blog_content_type, object_id=blog.pk).count()
	# context['comment_form'] = CommentForm(initial={'content_type': blog_content_type.model, 'object_id': blog_pk, 'reply_comment_id': 0})
	response = render(request, 'blog/blog_detail.html', context)
	# max_age,设置60秒后过期. expires=datetime:设置指定时间后失效； 不设置max_age和expires，浏览器关闭后才失效
	# response.set_cookie('blog_%s_readed' % blog_pk, 'true')
	response.set_cookie(read_cookie_key, 'true')  # 阅读cookie标记
	return response